Topical skin products effective for photoaging reversal. (AESTHETIC DERMATOLOGY.
Importantly, some of these formulations not only show efficacy in reversing the signs of photodamage to skin and in promoting rejuvenation, but may have a role in skin cancer prevention as well, said Dr. Moy, a dermatologist and facial plastic surgeon in private practice in Beverly Hills, Calif.
Some patients may question why they need to apply such agents when sunscreens offer much-touted protection, he noted.
"Sunscreens can help you 15-20 years down the road, but they don t repair past damage. We have a better way of repairing [existing] damage," said Dr. Moy, who is also past president of the American Academy of Dermatology and the American Society for Dermatologic Surgery.
More investigators are assessing the mechanisms and potential advantages of DNA repair, he said at the Orlando Dermatology Aesthetic and Clinical Conference. Since the Nobel Prize in Chemistry was awarded to scientists who discovered key mechanisms underlying DNA repair in 2015, "DNA repair has gotten a lot more attention," he noted.
Evidence suggests a person's DNA repair capability can modulate colon cancer risk. Also, smokers with a low level of DNA repair enzymes carry a higher risk for lung cancer, and DNA repair genes can predict ovarian cancer and lung cancer survival, Dr. Moy said.
"It is still not entirely understood how everything ties together," he said.
"But the work on DNA repair is convincing, more convincing than work on antioxidants or retinoids." Although antioxidants look favorable in experimental and animal studies, for example, "generally the published work on antioxidants does not give you good clinical results," he said.
DNA repair enzymes have a beneficial effect on the proto-oncogene hyperexpression in human skin and ultraviolet light telomere shortening, according to an experimental pilot study in the Journal of Drugs in Dermatology (2013 Sep;12: 1017-21).
Also, a DNA repair enzyme derived from bacteria, T4 endonuclease V showed promise in an older study of 30 patients with xeroderma pigmentosum (Lancet. 2001 Mar 24;357:926-9). Those affected carry a higher risk overall for any skin cancer, compared with the general population. The DNA repair enzyme group had fewer new actinic keratoses and fewer new basal cell carcinomas, squamous cell carcinomas, and melanoma lesions at 1 year, compared with a vehicle-only group at 1 year.
Another class of DNA repair molecules, photolyases, is newer than T4 endonuclease V and "might work even better," Dr. Moy said.
"There is evidence that DNA enzymes are very effective and helpful in preventing skin cancer," he pointed out. One mechanism is the ability of exogenous DNA repair enzymes to bolster intrinsic DNA in the fight against carcinogenesis, according to a review article Dr. Moy and his colleagues published in the Journal of Drugs in Dermatology (2015 Mar;14:297-303).
The role of human epidermal growth factor for improving skin appearance and tightening is another area of active research and promise.
"It basically thickens and tightens skin," Dr. Moy explained. "It works better on thinner skin, including the eyelids and neck." Ultrasound objectively demonstrates gains in skin thickness. Studies also show improvement in acne scars following application of epidermal growth factor.
In addition, epidermal growth factor can enhance the appearance of solar purpura. In fact, this is the dermatologic condition with the most convincing evidence supporting its use so far, Dr. Moy said. Clinical studies have shown that epidermal growth factor along with other active ingredients also can improve acne scars and eye bags.
Dr. Moy is founder of DNA EGF Renewal in Beverly Hills, Calif., a company that manufactures skin care products containing epidermal growth factor and DNA repair enzymes.
DAMIAN MCNAMARA EXPERT ANALYSIS ROM ODAC 2017
Caption: DR. MOY
Please note: Illustration(s) are not available due to copyright restrictions.
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|Date:||Mar 1, 2017|
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